With regards to resolutions, as long as I can fit the game on my screen, I'm okay with it. I grew up on low-resolutions, I can handle gradual increases of detail, as long as I can afford a decent-sized monitor, and a good enough graphics card to complement it. Hell, I still play at 1280x1024. Sure, some games aren't as pretty as they potentially could be, but it does emulate my vision pretty well (I don't have the best of eyes), adding to the immersion in my gaming. I recall mentioning some time ago that I played Quake better at low resolutions than higher ones. Far easier to immerse myself into, I think.
Come and think of it, that was actually something I'm surprised wasn't mentioned. The immersion factor. Some games these days don't quite deliver the immersion as well as some older games; then again, I've been pretty limited in my playings lately (Real Life, the game that costs your soul to play). But always an interesting note would be the peripherals with some systems. Like the 3-D glasses and the lightgun with the Sega Master System (Missile Defense 3-D rocked; it combined those 2 items very well, despite the classic vector graphics (which added to the effectiveness of the 3-D actually; you had to play it as it was originally designed to appreciate it), and hell, even the bazooka for the SNES had it's share of immersion; so well, even emulating it, and using the mouse instead of a lightgun is still an immersive experience (Super Scope 6 and the Battle Clash series still feel awesome to play).
My only real hope with VR and AR gaming is that they get the immersion down right. Hell, if someone even makes an elaborate, yet rather redundant, emulator that replicates the classic TV experience of gaming in a virtual/augmented environment (including the lightguns; pulling that off deserves a medal. Augmented would involve Hololens, and adding a gaming TV (which can also be modded as a semi-existent TV)); that would even qualify for me. For some reason, the anime Fractale comes to mind.
EDIT:
I had an interesting thought, combine Garry's Mod Cinema and the VR emulation experience, and get the sensation of playing a game in a private theater. Not as badass as actually doing it, like posted on Reddit and the like plenty of times, but hey, now others can enjoy that experience too (provided anyone would be willing to take the time to pull it off; hell, I wouldn't mind paying for that kind of experience, provided the product is done well enough (multiplayer shared server experience; relive 4-player Bomberman with your siblings and friends across the country/world, and so forth again. And why not, invite others to spectate/distract)).